5.
    发明专利
    未知

    公开(公告)号:DK0401535T3

    公开(公告)日:1993-04-13

    申请号:DK90108772

    申请日:1990-05-10

    Abstract: In order to make the exhaustion of the ion exchanger visible in a device for water treatment using a weakly acidic or weakly basic ion exchanger contained in a tube, whose inlet opening is in the area of one end and whose outlet opening is in the area of the other end, each being formed by a device permeable to liquid but retaining the ion exchanger, a chamber (5), which contains a strongly acidic or strongly basic ion exchanger (8) with a colour indicator bound to this and having its wall at least partially composed of a transparent material, is disposed in the area of the outlet opening (4) of the tube (1).

    10.
    发明专利
    未知

    公开(公告)号:DE3918561A1

    公开(公告)日:1990-12-13

    申请号:DE3918561

    申请日:1989-06-07

    Abstract: In order to make the exhaustion of the ion exchanger visible in a device for water treatment using a weakly acidic or weakly basic ion exchanger contained in a tube, whose inlet opening is in the area of one end and whose outlet opening is in the area of the other end, each being formed by a device permeable to liquid but retaining the ion exchanger, a chamber (5), which contains a strongly acidic or strongly basic ion exchanger (8) with a colour indicator bound to this and having its wall at least partially composed of a transparent material, is disposed in the area of the outlet opening (4) of the tube (1).

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